Akademik Veri Yönetim Sistemi
KARTAL S. N. (Yürütücü), TERZİ E.
Yükseköğretim Kurumları Destekli Proje, BAP Araştırma Projesi, 2016 - 2018
This study evaluated the boron diffusion from raw boron minerals ulexite and colemanite with low water solubility compared to disodium octaborate tetrahydrate (DOT). Tests were conducted using Sugi (Cryptomeria japonica D. Don)sapwood and heartwood blocks conditioned to 30, 60, and 90% target moisture content levels. The blocks were filled with the boron compounds through treatment holes, and boron diffusion was observed at three assay zones across the blocks after a 7, 30, 60 or 90-day incubation period at room temperature. For comparison, ethylene glycol was also introduced into the holes to elevate boron diffusion in blocks. As expected, boron diffusion increased with increased moisture content in general, and boron levels were higher at the 60 and 90% target moisture content levels compared to the 30% level. With some exceptions, boron levels did not tend to follow consistent gradients with distance away from the treatment hole. Incorporation of ethylene glycol helped increase boron levels, even in heartwood blocks. Boron levels were higher by ulexite than by colemanite; however, DOT treatments resulted in the highest boron diffusion rates compared to both raw boron minerals as a result of higher water solubility. Results suggested that ulexite together with ethylene glycol may be useful in both sap and heartwood when wood is kept at high moisture content levels for extended periods.